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acid acre advantage agriculture allowed amount animal appears applied attention average barley become better bushels called carbonic carried cattle cause charcoal Class considerable considered contain corn course cows crop cultivation disease drains drill early effect equal exhibiter experiments extent fact fair farm farmers favourable feet field fine four give given grain grass ground hand hear horse implement important improved inches increase invented iron kind labour land late leaves less lime machine manufactured manure matter means meeting month nature necessary observed obtained opinion plants plough portion potatoes practice present prize produce proved quantity question rain received remarks result season seed sheep Society soil supply taken tion vegetable weather week wheat whole
Page 71 - ... in the growth of plants according to the known abundance or scarcity of humus in the soil, seemed to afford incontestable proof of its correctness. Yet, this position, when submitted to a strict examination, is found to be untenable, and it becomes evident from most conclusive proofs that humus in the form in which it exists in the soil does not yield the smallest nourishment to plants.
Page 110 - I conceive it will not be out of place here to give a short account of their rise, and of their effect on the progress of physical science.
Page 160 - I am sure there can be no difference of opinion as to the value of that class of our fellow countrymen whose health I am about to propose.
Page 99 - The other mode of rendering chalk soluble in water is nearly the reverse. In the former mode, a pound of pure chalk becomes dissolved in water in consequence of losing seven ounces of carbonic acid. To dissolve in the second mode, not only must the pound of chalk not lose the seven ounces of carbonic acid that it contains, but it must combine with seven additional ounces of that acid. In such a state of combination, chalk...
Page 404 - ... intentions of riding to Richmond. My little family would have been glad to see you, and you would have seen, I think, the best piece of meadow in Carolina, whence (when I leave this country) you might be able to add one to the few observations which may be made upon an unimportant character, viz., that I had made two blades of grass grow where only one grew before — a circumstance among some nations of no small honor and renown.
Page 355 - ... the subject, we believe that some legislative measure will be found necessary in order to give efficacy to such agreements, as well as to provide for those cases which cannot be settled by private arrangement.
Page 236 - Ligher than it had been perhaps before. The jets were made with inconceivable velocity, and those which escaped uninterrupted terminated in sharp points, and lost themselves in the air.
Page 115 - The oxygen we are breathing was distilled for us some short time ago by the magnolias of the...
Page 132 - If ever a farmer perceives a flock having a flushed appearance of more than ordinarily rapid thriving, he is gone. By that day eight days, when he goes out to look at them again, he will find them all lying, hanging their ears, running at the eyes, and looking at him like so many condemned criminals. As the disease proceeds, the hair on the animal's face becomes dry, the wool assumes a bluish cast, and, if the shepherd have not the means of changing the pasture, all those affected will fall in the...
Page 449 - In order to ascertain the effects of different kinds of charcoal, experiments were made upon that obtained from the hard woods and peat, and also upon animal charcoal, although I foresaw the probability that none of them would answer so well as that of pine wood, both on account of its porosity and the ease with which it is decomposed.